package chapter03;
class de{
    public de(){
        System.out.println("调用了无参构造方法");
    }
}
public class Example05 {
    public static void main(String[] args) {
        System.out.println("声明对象....");
        de stu=null;
        System.out.println("实例对象....");
        stu=new de();
    }
}
